Temperature control on the cheap
I'm a cheapskate and an experimentalist so I'm always thinking of ways to cut corners. I wondered how well I could control temperature using a crockpot and a cheap controller.
So, I got the Inkbird C206T controller and used a rubber band to strap its sensor to a quart jar with 500g of water and my floating bluetooth thermometer inside. I filled the crockpot with enough water to match the water level in the jar, covered the whole thing with a "shower cap" and a small blanket. I set the controller for 43.5C.